The volleyball indoor court is 18m x 9m. Surrounded by a free zone that is a minimum of 3m wide on all sides. The centre line divides the court equally; 9m x 9m each. The space above the volleyball court should be at least 7m height and should be clear of any obstacles.
In FIVB official games, the space above must be a minimum height of 12.5m, sides 5m and 6.5m from the back line.